Why does the narrator use a metaphor comparing the phoenix to poetry in paragraph 7? in The Phoenix Bird

Why does the narrator use a metaphor comparing the Phoenix to poetry in Paragraph 7? The authors compares the phoenix to poetry because they are both beautiful and inspiring.

Ialways thought that he thought it wasn’t fair because he thinks that people should be able to experience things and think outside of the box, or see color and add brightness and happiness to their lives but idk.